Masters Theses


Kurt H. Frank


"The problem involved in this thesis is definitely of an industrial nature in that it deals specifically with waste from a plant that is primarily concerned with the manufacture of pigment.

….the plant does have a method of recovering the soluble titanium by returning the overflow from the Dorr thickener to the digestion tanks to dilute (cut) the digestions. However, in the underflow (sewer) there is a tremendous amount of sludge that is sent directly into the nearest stream because of failure to realize something economical to do with it. This sludge contains roughly 30 per cent solids of the following analysis: 30 per cent titanium dioxide; 1 per cent antimony (all of which was added as a coagulating agent); 10 per cent ferrous sulfate; 5 per cent sulfuric acid; and gangue material.

The economic necessity of developing a better method of recovery is recognized and it should be possible to solve such a problem thru plant modifications and operations. The following program was organized to study this problem.

1. First, analyse the feed, overflow and underflow of the present recovery system in order to obtain a qualitative picture of the materials present and at the same time develop procedures for rapid, fairly accurate analysis for key components.

2. Second, develop a method of recovering titanium and antimony compounds from the solids by either an improved method of water classification, flotation, or other methods.

3. And third, interpret the results obtained and make constructive suggestions regarding plant modifications and operational changes"--Introduction to the problem, pages 1, 3, 4.


Schrenk, Walter T.


Chemical and Biochemical Engineering

Degree Name

M.S. in Chemical Engineering


Missouri School of Mines and Metallurgy

Publication Date



vi, 63 pages

Note about bibliography

Includes bibliographical references (pages 61-62).


© 1951 Kurt H. Frank, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Factory and trade waste -- Purification
Recycling (Waste, etc.)
Pigments -- Waste disposal
Titanium -- Waste disposal

Thesis Number

T 989

Print OCLC #


Electronic OCLC #